Pridiom PGD970DES, User Manual

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HOW IT WORKS
Your Pridiom Desiccant dehumidifier removes moisture using a continu-
ously rotating moisture absorbing wheel/rotor (This ‘Desiccant Rotor’ is liter-
ally a ‘honeycomb’ of extremely hygroscopic membranes). A highly efficient
yet low noise fan draws air into the unit (Process Air) and forces it through a
portion of the absorbent rotor. As the air passes through the rotor, the honey-
comb, of hygroscopic membranes absorb almost all of the moisture creat-
ing an extremely dry airstream, this airstream is discharged directly through
the ‘Dry Air Outlet’. A second fan pushes a separate air stream (Regen Air)
through a heater bank (Regen Heater) where it’s temperature is raised. This
air is then channelled back through a section of the rotor . As this air passes
back through the membranes, its higher temperature drives-out the previ-
ously absorbed moisture and discharges it as warm wet air through the ‘Wet
Air Out’ duct. As the wheel rotates, this process of collecting and discharging
moisture is continuous.
DESICCANT ROTOR
The Desiccant Rotor is the heart of the
dehumidifier. It is an array of specially
absorbent membranes arranged as a series of
corrugations (as shown in the cut-away image
below) to give a vast surface area making it an
extremely efficient moisture collector.
It is encases in a galvanized steel ring and turns
on high quality sealed ball bearing units.
REGEN HEATER BANK
The PGD970DES uses a ceramic PTC type
regen heater.
PTC (Positive Temperature Coefficient) heaters are
base on a semi-conductor that changes resist-
ance as it becomes hotter. The semi-conductor is
designed so that it’s resistance rises rapidly at a
predesignated temperature, thus it maintains this
temperature across a wide range of operational
conditions.
This characteristic means that the heating element
can never over heat to hazardous temperatures,
even if the regen airfow is completely blocked.